Radical TechMart ATC 820 USB To Single Port RS-485 Converter Network Interface Card  (Black)

The ATC-820 is an Surge Protection USB to 1-Port RS-485 converter that is designed for PC, thin client, or server to provide instant COM port expansion via the Universal Serial Bus (USB). Supports Windows 95/98/Me, 2000, 2003, XP, Vista,Win7, CE, Linux. The ATC-820 module is a cost-effective way to convert USB interface to RS-485 industrial buses. When connected to a PC USB port. The ATC-820 module is automatically detected and is installed as a native COM port which is compatible with any existing serial communication application. The ATC-820 converter can be configured for RS485 two-wire (Half Duplex) networks. When operating in two-wire RS485 the data transfer control is automatically done by the converter. The ATC-820 has a 384 byte receive buffer with an adjustable timeout and a 128 byte transmit buffer with auto-transmit control. The ATC-820 makes it easier to add RS-485 devices to your system with easy plug-and-play.